This will be my second "just-for-fun" guide (first one being racecar veigar, and yes I do want to make every champ move faster than the speed of light) and after what I did to my first guide, I thought that movespeed can be deadly good to a champ named Hecarim. So I looked for viable items and played a bit of normals to see if it really works, and voila, here is the build. Hope you guys have fun with this one since I, for one, really had great time playing this build. This is a guide that I just made over an hour or so just for the sake of wanting to see people trying out what I find fun in league. So there are no in-depth stuff and blabbering here and there, just a short build and guide to make it an ease for those who just want to have fun in LoL.

This build centralizes on two things, movespeed and MORE MOVESPEED. It also revolves on one important skill, your Devastating Charge. How you use this early is pretty simple:
Ghost > Youmuu's Ghostblade > Devastating Charge > PROFIT!
Late-game is a matter of mind games and how to avoid certain cc's that'll prevent you from one-shotting squishies. After getting a hang of it, you'll be good in no time.

So I guess that's it, you can add this build to your "fun" list and visit it once in a while after a tilting ranked game. Or if you master it enough, then do it in a ranked game yourself. There's nothing more to it but to the one who'll be using it, you'll have endless possibilities and only you can discover that. So thanks for reading my guide and I hope you'll enjoy with it, peace!